Laser stands for Light Amplification by the Stimulated Emission of Radiation. One basic type of laser consists of a sealed tube, containing a pair of mirrors, and a 10000mW 532nm green laser pointer that is excited by some form of energy to produce visible light, or invisible ultraviolet or infrared radiation.
There are many types of laser pointer, Green Laser Pointer 3000mw(from 5mw to 1000mw),blue laser pointer (from 1000mW to 5000mW), violet blue laser pointer/purple laser pointer(from 5mw to 500mw), red laser pointer(from5mw to 200mw) and laser light etc.
20000mw laser pointer and focusable laser pointer 100mw can light matches and even cigarettes easily, the red laser pointer and purple laser pointer in flashlight shaped are water-proofed and with focusable lens wihch can light matches with in 3meters in 2seconds.
Laser Pointer Blue 30000mw seems that the charming blue laser beam nearly lighting up the whole space. Its blue laser beam seems much more attractive and marvelous than any other type of laser devices andled lights have projected.